/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/BSD-3-Clause
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.tencent.angel.worker.task;

import com.tencent.angel.common.Id;
import com.tencent.angel.exception.UnvalidIdStrException;

/**
 * Identify Task
 */
// TODO: 17/6/27 by zmyer
public class TaskId extends Id {
    private static String TASK = "task";

    /**
     * Instantiates Task with task index
     *
     * @param taskIndex the task index
     */
    public TaskId(int taskIndex) {
        super(taskIndex);
    }

    /**
     * Instantiates Task with 'idStr'
     * <p>
     * 'idStr' must match task_XXX
     * </p>
     *
     * @param idStr the id str
     * @throws UnvalidIdStrException the unvalid id str exception
     */
    public TaskId(String idStr) throws UnvalidIdStrException {
        if (idStr == null) {
            throw new UnvalidIdStrException("id str can not be null");
        }

        String[] idElemts = idStr.split(SEPARATOR);
        if (idElemts.length != 2 || !idElemts[0].equals(TASK)) {
            throw new UnvalidIdStrException("unvalid id str " + idStr
                + ", must be like this:" + TASK + SEPARATOR + "taskIndex");
        }

        try {
            index = Integer.valueOf(idElemts[1]);
        } catch (Exception x) {
            throw new UnvalidIdStrException("unvalid id str " + idStr
                + ", must be like this:" + TASK + SEPARATOR + "taskIndex");
        }
    }

    @Override
    public String toString() {
        return TASK + Id.SEPARATOR + super.toString();
    }
}
